Space Shuttle Era: The Ground Umbilical Carrier Plate
The Ground Umbilical Carrier Plate provides one of the critical connections between the shuttle and the launch pad. The GUCP, pronounced "Gup," helps funnel gaseous hydrogen from the external tank into a system of pipes that safely burns off the excess fuel. Launch controllers track the readings from sensors on the GUCP for signs of a hydrogen leak. When readings are outside the limits, the countdown is halted so technicians can make repairs.
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